package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.mapper.UserMapper;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * 功能简述:
 *
 * @author 86156
 * @date: 2024/09/08
 */
@Service
public class UserServiceImpl implements UserService {

    private static final String WX_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    @Override
    @Transactional
    public User wxLogin(UserLoginDTO userLoginDTO) {
        // 调用微信服务接口，获取当前用户openid
        String openId = getOpenId(userLoginDTO.getCode());
        // 判断是否为空，如果为空登录失败
        if (openId == null) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        // 判断是否是新用户，如果是新用户，自动完成注册
        User user = userMapper.selectByOpenid(openId);
        if (user == null) {
            user = User.builder()
                    .openid(openId)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        // 返回用户信息
        return user;
    }
    public String getOpenId(String code) {
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN_URL, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }

}
